Frederick meter



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FREDERICK MEYER, oE NEWARK, NEW JERSEY. Leiters Pam No. 64,686, dma May 1i, 1867.

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'I'O ALL WHOM IT MAY CON CERN:

Be it known that I, FREDERICK MEYER, of Newark, in the county of Essex, and State of New Jersey, have invented aA new and improved Machine for Grinding and Gauging Scale-Pivots; andI do hereby declare that the following is a full, clear, and exact description thereof, which will enable others" skilled in the art to make and l use the sume, reference being had to the accompanying drawings, forming part of this specification.

The object of this invention is to grind or polish the pivots on scale-beams and levers in .such a manner that thereby the samel are correctly gauged, so 'that the distances between the diil'erent pivots are exactlyiand automatically determined. The invention consists in arranging a set of Irevolving emery-whe'els on a stationary frame, and in so constructing and making a horizontal sliding carriage, a nd providingr the same with stop-pins or screws, that when the scale-beam or lever is laid upon the said sliding carriage it.may be fed to the emerywheels, so that the saule will grind and polish the pivots. The said pins or set-screws striking against some stationarybeams, or other obstruction, do thereby determine how far the carriage may move, and how much of the pivots is to be ground ofi'. Thus, by reversing the position of the lever n the carriage, the distance of the end ,f pivots from the centre pivots, on scale-beams for common lever-scales, is very accurately gauged, so that both ends will lbe exactly equally far Nfrom the centre. In the annexed-drawing my invention is completely illustrated- Figure 1 being a plan or top view of my improved machine inposition for grinding the centre pivots of a lever.

Figure -2 is a similar view, the parts being in position to grind the pivots which are on one end of theleverf Figure 3 is a similar view, the parts being in position for grinding the pivots on a lever for platform-scales.

Figure 4 is a side elevationv of my machine partly in section.

:Figure 5 is afvertical transverse Section of the same, taken on the line x :12, iig. 1.

Figure 6 is an end view of the saine, partly in section.

Similar letters ot' reference indicate like parts. y

A is a framehwhich is made of wood or of any other suitable material strong enough to support all the working parts of this machine. The vframe is supported by four (more or less) uprights B, as shown in the drawings. A rectangular frame, C, is placed upon the frame A, and can be moved forward or backward by-a lever, a, which is secured to a horizontal shaft, b, as seen,- to which a cam, c, is. secured, connecting with a lever, ci', the latter being pivoted to the frame G. By moving the lever a in the direction of the arrow 1, (g. 4,) thc frame C will be moved in the direct-ion indicated by the arrow 2, and 'vice versa. This frame C may ns wellvbe moved by means ofvscrews or other analogous devices. Upon cach side of' this frame C is secured a triangular block, c, the inclined edge of which comes in contact with an incline,f, on a frame, D, which is arranged above the frame C, as shown, so that when the frame C is moved as indicated by the arrow 2, the frame D will he raised, and when C is moved in the opposite direction D will be lowered. The frame Dis guided by means of pins or blocks g, which slide in slots g arranged in the frame A, as shown in gfl., Rails d are arranged on the upper surface of the side bars of the frame D. Upon these rails slides and is arranged the carriage E, as shown, which is moved forward or backward by a screw, z, which is secured to the frame D, andis operated by a crankswheel, h. Other devices may be used for the purpose of moving and adjustingthe carriage E. A shaft, F, is arranged on top of the frame A, as shown, and-upon it are `mounted emery-whcels or grindstoncs Gr, by which the pivots are ground. An upright arm, z', which is arranged on one endet the carriage E, is provided with two (more or less) set-screws or pins [c and I, which strike against a bnr, H,.as the carriage is moved, said har H being firmly secured to the frame A.

To grind the scale-pivots the lever or beam is placed upon the carriage E, which is ,made to suit the size and shape of the scale-beams or lever; the same is then fastened down by means of cross-bar and screw m; the carriage is then raised by means of the lever'a, which lever is held in a notch in the bent plate a', wherby the carriage is prevented from dropping again. The centre pivots n of the lever are first ground The carriage is, when the lever N is placed thereon, as shown in figs. 1 and 4, moved by the screw 7L in thi direction of the arrow 3, tig. 4, until the pin c strikes the bar H. As soon as this is the case, that side of th pivots has been ground suiiciently. The carriage is then lowered, and' is, by means of the screw L, movedi 'the direction of'the arrow 3, lintil the pin Z will be on the inside of bar H, or until the pivots n will oifer their unground surface to the wheels Gr.l Then the carriage is raised and moved in the opposite direction untill strikes H. In fig. 5 this second position is shown. To grind the end pivots o o the beam is secured to the' carriage as indicated in fig. 2.

i The sharp edges of the centre pivots t into notchespp on the carriage, so that when one end is finished the other end might be brought into the sanne position: The stopslc endlwill then stop the carriage equally for each set of end pivots, and so the end pivots must be exactly equally far from the centre pivots.

In gs. 3 and 6 is shown n lever, P, for platform-scales. It is secured in the same Way as the other lever. If it should be too broad, upright sliding bars g g, which are operated by cams 1' r on shafts S S, may be raised to support the projecting parts ofthe lever. The Wheels G must be shifted on the shaft F, so as to come in line with the pivots, as shown in iig. 3. i

Having thus descri-bed my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The construction and arrangement of the longitudinally sliding carria-L'e C. reciprocating carriage D, and carriage E, as herein set forth for the purpose specified.

2. Adjusting the settle-pivots to be ground upon both sides by means of the set-screws or pins k Z secured to the a-rrn z' of the sliding carriage E; and bar H upon the frame A, substantially as herein set forth.

FREDERICKQIEYER.

Witnesses:

WMjF. McNAMnnA, ALEX. F. ROBERTS. 

